AIKO-A445-MAH54Db Black Hole Dual Glass Instruction Manual

FIND FOUR POWER
AIKO PV Module Installation Manual
Double Glass Module

AIKO-A445-MAH54Db Black Hole Dual Glass

***** Product data updated by the end of August, 2023. AIKO Energy reserves the right to revise the manual without prior notice.
AIKO reserves the right to change this Manual without prior notice
Please check the latest version of the Installation Manual in the official website of AIKO
Website: www.aikosolar.com
Double Glass Modules Installation Manual, version 2.0, August 2023

https://www.aikosolar.com

Important safety instructions

• This Installation Manual provides information regarding the installation and safe use of PV power modules (hereinafter referred to as “modules”) produced by AIKO Digital Energy Technology Co., Ltd. (hereinafter referred to as “AIKO”). Installation and day  to day maintenance of modules shall be in accordance with all safety precautions specified in this Manual and local laws.
• Installation module systems requires specialized skills and knowledge, and modules shall be installed and maintained by qualified persons. The installers shall be familiar with mechanical and electrical requirements of the system. Please keep this Manual for future maintenance or treatment.

Overview

Thank you very much for choosing the products of AIKO Digital Energy Technology Co., Ltd. (hereinafter referred to as “AIKO” ). This Installation Manual contains important information regarding electrical and mechanical installation which you shall know before installing modules. It also contains some other safety information that you must be familiar with.
This Installation Manual is not intended as any warranty, expressed or implied. Nor does it include any indemnification plan against loss, module damage or other expenses directly arising out of or in connection with the installation, operation, use or maintenance of modules. No null without prior notice.
Customer’s failure to install modules according to the requirements listed in this Installation Manual will invalidate the limited product warranty offered to customer. Recommendations in this Manual are provided to improve installation safety, and are based on tests and practical experience. Please provide this Manual to end customers (or consumers) and inform them of all safety, operation and maintenance requirements and recommendations.

Laws and acts

Mechanical and electrical installations of PV modules shall be executed by referring to the applicable laws and acts, including the electrical act, building act and electrical connection requirements. These requirements vary from one location to another, such as building rooftop installations and onboard applications. They may also vary with mounting system voltage and current property (DC or AC). Please contact your local authority for further details.

General information

Structural diagram of double glass modules and component description 3.1 Module identification
AIKO modules provide Two visual labels:
Nameplate
Product type, information regarding the rated power, rated current, rated voltage, open circuit voltage, short circuit current under standard test conditions (STC), maximum system voltage and certification mark, etc.
Serial number
Each individual module is identified with a unique serial number which is printed on the barcode and placed into the module before lamination such that it cannot be torn or daubed after lamination. The same serial number can also be found at the side of frame of module as well as at the back of module.
Nameplate

www.aikosolar.com

Barcode labeling

Packing List
Packing list including the information of the module type, product serial number, package weight, package dimension as well as cells color classification. To ensure consistency of the overall color of system when the customer use the modules, the box of modules is packaged according to the same color of cells and marking the with S1, $2, S3, on the packing list. Following as an sample:

Packaging List

450/A/12BB/1722113435mm/FT5Oxy,25A,FMK5040D,RHC2xyzu,350mm/Al23224013
N.W.| 756.0KG| G.W.| 801.0KG| Package Size| 177011401275mm
S/N:2D| Remark:
Made in China

3.2 Wiring method
The junction box of AIKO modules is located in the middle position. Please refer to the table below for how to connect AIKO modules in series.

Position of junction box| Module mounting type| Connection diagram
---|---|---
| Mounting on the long side, single row| Horizontally adjacent modules are directly connected at the shortest distance or, if the wire is too long, by placing the wire into the secondary beam.
Mounting on the long side, double rows| 1. Horizontally adjacent modules are directly connected at the shortest distance or, if the wire is too long, by placing the wire into the secondary beam;
2. Connections between adjacent rows of modules shall be designed and installed by considering the opposite polarity on the same side as shown below. Adjacent modules are side connected by routing the wire through a duct instead of using an uncovered wire.
Mounting on the short side, single row| In vertical installation, connections between vertically adjacent modules are de- signed and installed with opposite polarities between adjacent modules as shown and the extension line can be placed into the secondary beam.
Mounting on the short side, multiple rows| 1. Vertically adjacent modules as shown below are connected at the shortest di- stance;
2. Connections between adjacent columns of modules shall be designed and installed by considering the opposite polarity on the same side as shown below. Adjacent modules may be side connected by placing the wire into the secondary beam.

Table 2: Connection diagram as per mounting type

3.5 General safety
AIKO modules are designed to operate in application according to IEC standards IEC-61215 and IEC-61730. Modules are designed with safety class Il and fire class rating C.

• Before to handle and install AIKO PV module, read carefully and understand this Installation Manual. If you need any explanation, contact AIKO (aikosolar.com)

• Always use appropriate protections such as insulated tools, safety helmets, insulating gloves, safety belts and safety insulating shoes when handling the module whether it is or not connected to the system. Please use appropriate electrical safety tools when you need to install, ground, connect, clean or handle the module.

• PV modules generate DC electrical energy when exposed to sunlight or other light source. Improper contact with live parts of the module (e.g. connectors) can result in burns, sparks, and lethal shock.

• Observed local laws and regulations for module installation and obtain a building license or other qualifications where necessary.

• Modules shall be installed by qualified persons who have specialized skills and knowledge and are familiar with the mechanical and electrical requirements of the system. Potentially harmful risks during installation, including electrical shock, shall be identified in advance.

• Rooftop systems can only be installed on the roofs which have passed the evaluation of construction experts with formal, full structural analysis results, where necessary.

• Observed the safety regulations for all mounting components. For example, wires and cables, connectors, inverters and batteries.

• Artificially concentrated sunlight shall not be directed onto the module.

3.4 Electrical safety
Please strictly follow the electrical safety precautions below to avoid any form of electrical safety accident.

• Modules can generate DC voltage>S0V, current>10A under standard temperature condition (STC), Take care to avoid direct contact. When installing modules, wear protective helmets, insulating gloves, and rubber shoes. Do not install components without  security precautions.

• Do not drill holes in the frame, this action risks module insulation failure.

• Do not make electrical connection by means other than connectors.

• Broken modules have the risk of electric shock and fire that must be replaced immediately.

• Module should be installed when it is electrically safe to do so.

• Avoid touching modules as the surface and frame of the modules may be hot and there is a risk of burns or electric shock. The voltage connected in series of the modules must not exceed the maximum withstand voltage value.

• Do not connect or disconnect the module when there is a current leakage of module or when there is an external current present. Please disconnect the faulty modules with safety protection.

3.5 Handling safety

• Standing, stepping, sitting, walking or jumping directly on the module package or module is prohibited.
• Do not place heavy objects on the module.
• Do not connect the positive and negative anode cables of the same PV module together.
• Do not open the packing box before the modules arrive at the location, keep the packing box in a ventilated, dry environment.
• During the transportation, please refers to 4.0 Storage and Transportation instructions. Any inappropriate handing and storage can result in breakage of glass or loss of electrical property, and consequently loss the use value of modules.
• Take careful when install the modules, In any case, it is forbidden to lift the module by lifting the junction box or cable. At least two or more than two operators must hold the edge of the module with both hands.
• Do not try to dismantle the module or remove any nameplates or components of modules.
• Do not apply paint or other adhesives to module top surface.
• Do not damage or scratch the glass on front side and back side of module.
• Do not drill holes on the frame of module, which may reduce frame loading capacity and lead to frame corrosion and invalidation of the limited warranty provided for customers.
• Do not scratch anodized coating of aluminum alloy frame except for grounding connection. Scratch may lead to frame corrosion and reduce frame loading capacity and long-term reliability.
• Do not repair or modify the module on your own.

3.6 Fire safety

• Please refer to local laws and regulations before installing any module and observe their building fire safety requirements.
• Rooftop installations shall be placed over fire resistant roof coverings appropriate for this rating, and adequate ventilation shall be provided between the back cover and the mounting surface. The roof structure and module mounting method will affect the fire safety performance of the building. Inappropriate installation can lead to fire risks.
• To guarantee roof fire rating, the distance between module frame and roof surface must be greater than 10 cm.
• Please use the appropriate module accessories, e.g., fuses, circuit breakers and ground connectors, according to local laws and regulations.
• Please do not apply modules in where exposed inflammable gases are nearby.

Storage and transportation instructions

4.1 Considerations for module turnover and handling
Upon arrival of the modules, please check the packaging box is in good condition, and check whether the module type and quantity on the outer packaging are consistent with the delivery order, if anything is wrong, please contact AIKO logistics and sales staff immediately.

• Crane unloading:
  When unloading the modules by crane, please choose and use specialized tooling according to the weight and size of the pallet.
  Please adjust the position of the sling to keep the modules steady.
  To ensure the safety of the module, wooden sticks, boards or other fixtures of the same width as the outer packing cases should be used on the upper part of the box to prevent the sling from squeezing the pallet and damaging the modules. Please operate the spreader at a constant speed, when the lifting is close to the ground, place the box gently in a relatively flat ground. **** Do not unload modules under the weather conditions of wind more than 6 class (in Beaufort scale)

• Forklift unloading:
  The loading dock should be as the same height as the underside of the carrier.
  Keep the straight line speed of forklift within 5km/h and the turning speed within 3km/h. Please avoid sudden stop and rapid start.
  If the packing box blocks the sight of the forklift driver, it is recommended to drive backwards during the fork-lifting, and arrange for special supervision and command to prevent bumping into people or items causing personal injury or damage to the modules.

4.2 Considerations for module turnover and transportation

• When using forklift to transport modules, please ensure that the fork length meets the requirements to avoid module tilting due to uneven force.
• When opening the packing box, please place the modules to be unpacked at a distance of 20-30cm from the wall or another torr of modules, and then remove the torr. After removing the cable tie of the fixed modules, slowly lean the modules against the wall or another torr of modules to prevent them from falling.
• Please handle the installation modules gently during transportation, Do not lift the modules by pulling the junction box or cables under any circumstances. Two or more people must hold the edges of the modules with both hands.

4.3 Considerations for module storage and placement

• Please store the packing box of modules in a clean, dry place with relative humidity below 85%. The storage temperature should be between -20 °C and 50 °C . When storing modules for a long time, do not place the two boxes of modules on top of each other.
• In any circumstances, keep the junction box and cables of the modules clean and dry.
• Store modules in a ventilated, rainproof, dry place, If placed outdoor, please fully cover the modules and pallets with a rain protection and take moisture-proof measures on pallets and cartons to prevent collapse and moisture ingress.
• For the storage of scattered modules, please stack the vertical modules flat on the empty torr. The first module should be placed with the glass side up, and the following ones placed with the glass side down. (A maximum of 22 pieces of modules for 54 types and 16 pieces of modules for 72 types can be stacked together).
• For long-term storage, do not remove the original package and keep the wrapping film and carton box in a good condition. It’s recommended to place modules in a standard warehouse for long-term storage and conduct regular inspections. Once there is an abnormal tilt, please take enforcement measures in time.

Installation conditions

5.1 Location and working environment

• Modules are recommended to be installed in a -20°C~50°C environment, with an extreme working ambient temperature of -40 °C~85 °C and a humidity less than 85%RH.
• Modules are designed to operate up to 2000 m above sea level.
• Do not install modules in locations or areas where there is a risk of flooding, and do not install or place modules near near open flame or flammable materials.
• Modules can be installed at a distance of 50m away from the seashore. In the case when the modules are installed within 50m to 500m distance from the seashore, the frame and related components need to be treated with anti-corrosion.
• For rooftop installations, leave a safe working area between the edge of the roof and the external edge of the PV module array.
• For rooftop installations, check the roof loads and make a construction organization plan to meet the applicable standards.
• Modules shall be positioned to receive adequate sunlight and avoid shading the module surfaces in part or in whole (by trees, buildings, etc).
• Modules shall be installed in a well-ventilated position to ensure adequate air circulation on the back and sides of the module and allow immediate dissipation of heat produced during module operation, poor heat dissipation of the modules will decrease the output power and affect the overall power output of modules.
• When modules suffer high wind or snow pressure, supports and fixings shall be designed according to local design standards to keep external loads within the maximum mechanical strength that modules can withstand.
• In areas (coastal areas, factories, volcanic areas, farmlands) exposed to salt fog, sulfide or ammonia gas, corrosion can occur at the connection between the module and the racking or at the ground connection. Anticorrosive materials (e.g., stainless steel or aluminum materials) must be used in contact with PV modules and the mounting position must be protected against rust.
• After the modules are installed, measures such as grounding must be taken to ensure that the modules are protected against lightning strikes.

5.2 Tilt angle selection
Tilt angle of PV modules is the angle between the PV module and the horizontal ground. Different projects shall choose different installation inclination angles according to local conditions.
All modules in the same array shall be of the same orientation and angle. Different orientations and angles will result in different total solar irradiation absorbed by modules, leading to output mismatch that degrades system operating efficiency.
In order to achieve the maximum annual generating capacity, the optimal orientation and inclination of PV modules in the installed area should be selected. When the surface of the module is perpendicular to sunlight, the output power reach the maximum output value. AIKO recommend the installation angle shall not less than 10 degree. The optimal tilt angle of PV arrays shall be designed by taking into account the multi-year mean monthly irradiance, direct irradiance, scattering irradiance, wind speed and other climate conditions at the location. PV modules should be tilted at an angle to receive the maximal annual irradiance. Angles shall be selected by considering natural conditions such as local wind load, snow load and avoidance of water and dust collection on module surfaces. For details on the optimal tilt angle for installation, refer to consult a reliable local solar system installation company.

Mechanical installation

6.1 General requirements

• Make sure that the modules are properly installed and the mounting structure are adequately fastened. Module mounting system shall be constructed of anticorrosive, ultraviolet resistant materials.
• Installation bracket system shall be tested and inspected by the third party testing institution with static mechanical analysis capacity in accordance with local national standards or international standards.
• In regions with heavy snowfall in winter, adjust the height of the mounting system so that the lower edge of the module is not covered by snow In addition, ensure the lower part of module is not in the shadow of plants, trees.
• For rooftop installations, the mininum gap between the module frame and the roof shall be 10cm which is good for air circulation to achieve better performance of module.
• The minimum mounting distance between adjacent modules is 10 mm.
• Make sure that backside of modules will not be in contact with bracket or building structures that can pierce into the inside of the modules, especially when the module surface is imposed by pressure.
• Modules can be installed horizontally or vertically. When installing the components, be cautious not to block the drain hole of the frame.
• The module loads described herein are test values. According to IEC 61215-2016 installation requirements, when computing the corresponding maximum design load, a safety factor of 1.5 need to be considered in compliance with the local laws or regulations. In additions, project design loads must be based on project location, climate, mounting structure and applicable standards. Design loads are determined by mounting suppliers. Please observe both the local laws and regulations and the instructions of structural engineers.

6.2 Mechanical installation of double glass modules
AIKO double glass modules can be connected to the racking system using pressure clamps and bolts. Modules must be mounted as recommended and illustrated below. Other mounting configurations may be used provided that consultation is made with, and prior written consent is received from, AIKO Energy. Failure to do so will invalidate our warranty.

6.2.1 Mounting pressure clamps
Specialized pressure clamps are used to mount modules as shown below.Under no circumstances should the clamp touch the glass or deform the frame. Be sure to avoid shadowing effect from the pressure clamp.
Be sure that pressure clamps will not fail due to deformation or corrosion while the entire module is under load. Pressure clamps > 50 mm in length and

3 mm in thickness are recommended. The overlapped distance between the pressure clamp and the module frame, D, shall be at least 7 mm but no more than 10 mm.
When choosing clamp-mounting, please be sure to use at least four clamps on each module. Depending on the local wind and snow loads, if excessive pressure load is expected, at least six clamps should be required to ensure the module can bear the load (more details, please contact AIKO technical personnel).
The applied value of torque should refer to mechanical design standard and the bolt type customer is using, for example: M8: 16-20 Nem.

6.2.2 Double glass modules clamp mounting diagram and corresponding loads
Double glass modules can be installed using pressure clamps. Following are the installation diagram and corresponding loads. Here, L stand for long side of module, W stand for short side of module, black shadowing area stand for the installation area of the middle of clamp. Distance and length are provided in mm; pressure is provided in Pa.

(A) CLAMP MOUNTING – LONG FRAME

Module model| Module size [mm]| Load [Pa]| Installation area D
---|---|---|---
30mm frame| 35/40mm frame
AIKO-A-MAH54Dw AIKO-A-MAH54Db| 1722*1134| +5400/-2400| 310≤D≤410| 350≤D≤450
AIKO-A-MAH72Dw AIKO-A-MAH72Db| 2278*1134| +5400/-2400| 430≤D≤530| 450≤D≤550

Table 3: Double glass modules clamp mounting diagram and corresponding loads, long frame (A)

(B) CLAMP MOUNTING – SHORT FRAME

Module model| Module size [mm]| Load [Pa]| Installation area D
---|---|---|---
30mm frame| 35/40mm frame
AIKO-A-MAH54Dw
AIKO-A-MAH54Db| 1722*1134| +1600/-1600| D=W/4-100| D=W/4-50
AIKO-A-MAH72Dw
AIKO-A-MAH72Db| 2278*1134| /| /| /

Table 4: Double glass modules clamp mounting diagram and corresponding loads, short frame (B)

(C) CLAMP MOUNTING – SHORT & LONG FRAME

Module model| Module size [mm]| Load [Pa]| Installation area D
---|---|---|---
30mm frame| 35/40mm frame
AIKO-A-MAH54Dw
AIKO-A-MAH54Db| 1722*1134| +1600/-1600| D1=W/4-100
D2=100| D1=W/4-50
D2=120
AIKO-A-MAH72Dw
AIKO-A-MAH72Db| 2278*1134| /| /| /

Table 5: Double glass modules clamp mounting diagram and corresponding loads, short & long frame (C)
Note: The above data is based on the static load requirements of IEC61215 standard.

6.2.3 Bolts Mounting

Using bolts to secure the module on the bracket through the mounting holes at the back of module’ s frame. Modules come standard with 4 or 8 mounting holes, matching M8 bolts, as figure below: ![AIKO A445 MAH54Db Black Hole Dual Glass

• Bolts Mounting](https://manuals.plus/wp-content/uploads/2023/10/AIKO-A445 -MAH54Db-Black-Hole-Dual-Glass-Bolts-Mounting.jpg)

It is important to ensure the bolts do not fail due to deformation or corrosion during the overall load of the module. AIKO recommend the thickness of washer should ≥ 1.7mm and use M8 nut and bolt, the tightening torque should be between 16-20 Am depending on the bolt grade.

6.2.4 Double glass modules bolt mounting diagram and corresponding loads
Double glass modules bolt mounting diagram and corresponding loads as below diagram

|
---|---
The outer four-hole bolt mounting, the beam perpendicular to the long frame| The inner four-hole bolt mounting, the beam perpendicular to the long frame
|
The outer four-hole bolt mounting, the beam perpendicular to the short frame| The inner four-hole bolt mounting, the beam perpendicular to the short frame

(D) BOLT MOUNTING – TRANSVERSAL

AIKO-A-MAH54Dw
AIKO-A-MAH54Db| 1722*1134| 30/35/40| +5400/-2400| +2400/-2400
AIKO-A-MAH72Dw
AIKO-A-MAH72Db| 2278*1134| 30/35/40| /| +5400/-2400

Table 6: Double glass modules bolt mounting diagram and corresponding loads, transversal (D)

(E) BOLT MOUNTING – LONGITUDINAL![AIKO A445 MAH54Db Black Hole Dual Glass

• Bolts Mounting 2](https://manuals.plus/wp-content/uploads/2023/10/AIKO-A445 -MAH54Db-Black-Hole-Dual-Glass-Bolts-Mounting-2.jpg)

AIKO-A-MAH54Dw
AIKO-A-MAH54Db| 1722*1134| 30/35/40| +5400/-2400| +2400/-2400
AIKO-A-MAH72Dw
AIKO-A-MAH72Db| 2278*1134| 30/35/40| /| +5400/-2400

Table 7: Double glass modules bolt mounting diagram and corresponding loads, longitudinal (E)
Note: The above data is based on the static load requirements of IEC61215 standard

6.2.5 Single-axis tracking system installation
AIKO 72 type modules come standard with four mounting holes matching M8 bolts (As shown in the figure below, the dotted box is marked that the four M8 bolt mounting holes are all outer four holes); 72 type modules have an additional four mounting holes matching M6 bolts (the circle is marked in the figure below), used for matching Tracking system product such as Tracker. Using bolt to install the module on the bracket through the mounting hole at the back of the module’s frame. Installation details as below:

Electrical installation

7.1 Electrical performance
The electrical performance parameters of AIKO modules are detailed in the product specification. Standard test conditions (STC) for PV modules: irradiance 1,000 W/m²; a cell temperature 25 °C; AM1.5. The maximum system voltage of AIKO modules is 1,500 V.
When modules are in series connection, the string voltage is sum of every individual module in one string. When modules are in parallel connection, the current is sum of the individual modules as shown below. Modules connected in the same string shall have the same product code and nominal power.If the module is passed through by a reverse current greater than the maximum fuse current of the module, the module shall be protected with an over current protector of the same specification. If more than two strings are connected in parallel, each module string shall be protected with an over current protector as shown above.
The string voltage must not exceed the maximum voltage that the system can withstand or the maximum input power of the inverter or other electrical devices installed in the system. To ensure this, the open circuit voltage of the array shall be calculated at the minimum expected ambient temperature at that location. The following formula may be used:

Maximum system voltage ≥ N×Voc×[1+ β *(Tmin-25)]

Where:
N ——— number of modules connected in series
Voc ——— open circuit voltage of each module (refer to product nameplate or specification) [V] B ——— thermal coefficient of open circuit voltage for the module (refer to the specification) [°C-1] Tmin ——— lowest ambient temperature [°C]

7.2 Cables and Connections

PV module’ s junction boxes with the IP68 protective level and composed of connected cables and IP68 connectors. The module has a positive and a negative PV wires connected into the junction box and a plug-and-play connector connected at the other end. Using the positive connector of the module to connect the negative connector of the adjacent module connects the two modules in series.
Use specialized solar cables and appropriate connectors according to local electrical and installation standards, codes and regulations at the location, and ensure that the electrical and mechanical properties of the cables are good. AIKO modules use specialized PV cables which have a cross sectional area of 4 mm² and are ultraviolet resistant. AIKO Energy recommends that all cables are run in appropriate conduits and sited away from areas prone to water collection.
AIKO recommend use copper cables with a minimum cross sectional area of 4 mm² which are rated for 90 °C and are UV resistant shall be used as PV connecting lines. The minimum bending radius of the cable is 43mm.

7.3 Connector
Take care to keep the connectors dry and clean. Make sure that the connector nuts are tightened before making any connection. Do not connect while the connectors are wet or otherwise abnormal. As connectors provide IP68 protection only when the positive and negative poles are fully mated, please connect modules as soon as possible after installation or take proper steps to prevent water vapor and dust from coming into the connector.
Avoid exposing the connector to direct sunlight and water. Avoid exposing the connector directly to ground surface or roof.
Make sure that all electrical connections are secure. Incorrect connection can result in electrical arcing and shocks.
Do not mate different models of connectors together.

Grounding

Modules are designed with an anodized anticorrosive aluminum alloy frame as a rigid support. Module frames must be grounded to ensure safe use and protect the module against lightning and electrostatic damage. Grounding must be made with the grounding device in full contact with the interior of the aluminum alloy and penetrating the oxide film on the frame surface.
Grounding devices include grounding screws, flat washers, puncture gaskets and grounding wires. All these items shall be constructed of stainless steel except grounding wires. Grounding wires shall be copper wires. Grounding conductors shall be connected to the ground through an appropriate grounding electrode. Third-party grounding devices meeting local electrical installation standards at the location may be used for grounding AIKO Energy modules. Grounding device shall be installed according to the operation manual provided by the manufacturer.

Following is the recommended grounding method:

There are Φ 4.2 mm grounding holes on surface C of the module frame. Use a separate grounding wire and accessories to connect the aluminum alloy frame of PV modules and connect the grounding wire to the ground. We recommend using M4x12 mm grounding bolts accompanied by M4 nuts, star washers and flat washers.
We recommend torquing grounding bolts to 3~7 Am and using 4 mm2 copper wires as grounding wires.
Unused module mounting holes on the frame may also be used for grounding purposes.
Connection mode: The star washer, flat washer, and ground wire are placed in sequence, threaded through the ground hole using screws, and tightened to secure the adjacent modules. We recommend using the following method to ground correctly, as shown in the figure.

Maintenance of PV modules

Modules shall be inspected and maintained on a regular basis, especially within the warranty period, which is an obligatory responsibility of the user. Any damage or other visible abnormalities of the module shall be reported to AIKO Energy customer service upon discovery.

9.1 Cleaning
The power output of modules is related to incident light intensity and can be reduced by dust collection or other shadings.
Dirt on modules must be cleaned up immediately.
The cleaning frequency depends on the degree of dirt collection. Modules installed at an adequate tilt angle will allow rainwater to clean the module surfaces, thereby reducing the cleaning frequency.
We recommend cleaning the glass surface of the module with a clear water- netted sponge. Do not clean modules with a detergent containing acid or alkali. Do not clean modules with a hair brush or other rough surface tools.
We recommend cleaning modules in the early morning or late afternoon or other periods of time when the light is weak and the module temperature is comparatively lower.

Method A: High pressure water cleaning
Water quality requirement

• PH:6-8
• Water hardness – calcium carbonate concentration: <600mg/L;
• Recommended use of soft water cleaning;
• Recommended maximum water pressure is 4MPa (40bar)

Method B: Compressed air cleaning

• Air pressure cleaning is recommended when cleaning soft stains (like dust) on modules. This technique can be applied as long as the on-site cleaning effect is good enough.

Method C: Wet test cleaning

• If there is too much stain on the surface of the module, it’ s recommended to carefully use an insulating brush, sponge or other soft cleaning tool.
• Ensure that any brushes or agitating tools are made of insulating material to minimize the risk of electric shock and that they do not scratch the glass or aluminum frame.
• For oil stains, it’ s recommended to use an environmentally friendly cleaner.

Method D: Robot cleaning

• If the cleaning robot is used for dry cleaning, the brush material is required to be soft plastic, so that the glass surface and aluminum alloy frame of the module will not be scratched during and after cleaning.

9.2 Visual checks of the modules
Visually checks for visual defects on modules, such as:

• Whether the module glass is broken;
  Whether the back cover of the module is cracked or otherwise abnormal:
  Whether the junction box is damaged or the cable is broken;
  Whether the module is shaded by foreign matter or shadows;
  Check whether the bolts fixing the module to the racking are loose or corroded and adjust or replace them if necessary;
  Check whether the modules are well-grounded;

9.5 Checks of connectors and cables
It is recommended to perform preventive examinations every six months, such as:

• Whether the connectors are properly sealed and the cables are properly fastened;
  Whether the sealant of the junction box is cracked.

9.4 AIKO Technical Support
In order to request Technical Support:

• Collect evidences of the issue as (a) photos and (b) measurements Be prepared to show the purchase invoice and module serial number Contact your Installer.

Website: www.aikosolar.com
Email: marketing@aikosolar.com

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